Citation:

S0012-821X(97)00030-7

Name: Major and rare earth element concentrations of basalts beneath ODP Hole 118-735B (Table 3)
Published: 1997
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

A wide-angle seismic experiment at the Atlantis II Fracture Zone, Southwest Indian Ridge, together with geochemical analyses of dredged basalt glass samples from a site conjugate to Ocean Drilling Program hole 735B has allowed determination of the thickness and the most likely lithological composition of the crust beneath hole 735B. The measured Na, composition of 3.3 +/- 0.1 corresponds to a melt thickness of 3 +/- 1 km, a result consistent with rare earth element inversions which indicate a melt thickness of between 1.5 and 4.5 km. The seismic crustal thickness to the north and south of the Atlantis Platform (on which hole 735B is located) is 4 +/- 1 km, and probably consists largely of magmatic material since the seismic and inferred melt thicknesses agree within experimental uncertainty. Beneath hole 735B itself. the Moho is at a depth of 5 +/- 1 km beneath the seafloor. The seismic model suggests that, on average. about 1 km of upper crust has been unroofed on the Atlantis Platform. However, allowing for the inferred local unroofing of 2 km of upper crust at 735B, the base of the magmatic crust beneath this location is probably about 2 km beneath the seafloor, and is underlain by a 2-3 km thick layer of serpentinised mantle peridotite. The P-wave velocity of 6.9 km/s for the serpentinised peridotite layer corresponds to a 35 +/- 10 vol% serpentine content. The Moho beneath hole 735B probably represents a serpentinisation front.

Coverage:

Latitude: -31.350000 * Longitude: 57.266700

Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m

Comment:

Each value is the average of 10 measurements. REE were analysed by ICP-MS and isotope dilution (5d-A)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	LATITUDE	Latitude				Geocode
2	LONGITUDE	Longitude				Geocode
3	DEPTH, sediment/rock	Depth sed	m			Geocode
4	Sample code/label	Sample label		Muller, M R
5	Silicon dioxide	SiO2	%	Muller, M R	Electron microprobe (EMP)
6	Silicon dioxide, standard deviation	SiO2 std dev	±	Muller, M R	Electron microprobe (EMP)
7	Titanium dioxide	TiO2	%	Muller, M R	Electron microprobe (EMP)
8	Titanium dioxide, standard deviation	TiO2 std dev	±	Muller, M R	Electron microprobe (EMP)
9	Aluminium oxide	Al2O3	%	Muller, M R	Electron microprobe (EMP)
10	Aluminium oxide, standard deviation	Al2O3 std dev	±	Muller, M R	Electron microprobe (EMP)
11	Chromium(III) oxide	Cr2O3	%	Muller, M R	Electron microprobe (EMP)
12	Chromium(III) oxide, standard deviation	Cr2O3 std dev	±	Muller, M R	Electron microprobe (EMP)
13	Iron oxide, Fe2O3	Fe2O3	%	Muller, M R	Electron microprobe (EMP)
14	Iron oxide, FeO	FeO	%	Muller, M R	Electron microprobe (EMP)
15	Iron oxide, FeO, standard deviation	FeO std dev	±	Muller, M R	Electron microprobe (EMP)
16	Manganese oxide	MnO	%	Muller, M R	Electron microprobe (EMP)
17	Manganese oxide, standard deviation	MnO std dev	±	Muller, M R	Electron microprobe (EMP)
18	Calcium oxide	CaO	%	Muller, M R	Electron microprobe (EMP)
19	Calcium oxide, standard deviation	CaO std dev	±	Muller, M R	Electron microprobe (EMP)
20	Potassium oxide	K2O	%	Muller, M R	Electron microprobe (EMP)
21	Potassium oxide, standard deviation	K2O std dev	±	Muller, M R	Electron microprobe (EMP)
22	Sodium oxide	Na2O	%	Muller, M R	Electron microprobe (EMP)
23	Sodium oxide, standard deviation	Na2O std dev	±	Muller, M R	Electron microprobe (EMP)
24	Magnesium oxide	MgO	%	Muller, M R	Electron microprobe (EMP)
25	Magnesium oxide, standard deviation	MgO std dev	±	Muller, M R	Electron microprobe (EMP)
26	Phosphorus pentoxide	P2O5	%	Muller, M R	Electron microprobe (EMP)
27	Phosphorus pentoxide, standard deviation	P2O5 std dev	±	Muller, M R	Electron microprobe (EMP)
28	Magnesium number	Mg#		Muller, M R
29	Lanthanum	La	mg/kg	Muller, M R
30	Lanthanum, standard deviation	La std dev	±	Muller, M R
31	Cerium	Ce	mg/kg	Muller, M R
32	Cerium, standard deviation	Ce std dev	±	Muller, M R
33	Praseodymium	Pr	mg/kg	Muller, M R
34	Praseodymium, standard deviation	Pr std dev	±	Muller, M R
35	Neodymium	Nd	mg/kg	Muller, M R
36	Neodymium, standard deviation	Nd std dev	±	Muller, M R
37	Samarium	Sm	mg/kg	Muller, M R
38	Samarium, standard deviation	Sm std dev	±	Muller, M R
39	Europium	Eu	mg/kg	Muller, M R
40	Europium, standard deviation	Eu std dev	±	Muller, M R
41	Gadolinium	Gd	mg/kg	Muller, M R
42	Gadolinium, standard deviation	Gd std dev	±	Muller, M R
43	Terbium	Tb	mg/kg	Muller, M R
44	Terbium, standard deviation	Tb std dev	±	Muller, M R
45	Dysprosium	Dy	mg/kg	Muller, M R
46	Dysprosium, standard deviation	Dy std dev	±	Muller, M R
47	Holmium	Ho	mg/kg	Muller, M R
48	Holmium, standard deviation	Ho std dev	±	Muller, M R
49	Erbium	Er	mg/kg	Muller, M R
50	Erbium, standard deviation	Er std dev	±	Muller, M R
51	Thulium	Tm	mg/kg	Muller, M R
52	Thulium, standard deviation	Tm std dev	±	Muller, M R
53	Ytterbium	Yb	mg/kg	Muller, M R
54	Ytterbium, standard deviation	Yb std dev	±	Muller, M R
55	Lutetium	Lu	mg/kg	Muller, M R
56	Lutetium, standard deviation	Lu std dev	±	Muller, M R

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

310 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Latitude	2 Longitude	4 Sample label	5 SiO2 [%]	6 SiO2 std dev [±]	7 TiO2 [%]	8 TiO2 std dev [±]	9 Al2O3 [%]	10 Al2O3 std dev [±]	11 Cr2O3 [%]	12 Cr2O3 std dev [±]	13 Fe2O3 [%]	14 FeO [%]	15 FeO std dev [±]	16 MnO [%]	17 MnO std dev [±]	18 CaO [%]	19 CaO std dev [±]	20 K2O [%]	21 K2O std dev [±]	22 Na2O [%]	23 Na2O std dev [±]	24 MgO [%]	25 MgO std dev [±]	26 P2O5 [%]	27 P2O5 std dev [±]	28 Mg#	29 La [mg/kg]	30 La std dev [±]	31 Ce [mg/kg]	32 Ce std dev [±]	33 Pr [mg/kg]	34 Pr std dev [±]	35 Nd [mg/kg]	36 Nd std dev [±]	37 Sm [mg/kg]	38 Sm std dev [±]	39 Eu [mg/kg]	40 Eu std dev [±]	41 Gd [mg/kg]	42 Gd std dev [±]	43 Tb [mg/kg]	44 Tb std dev [±]	45 Dy [mg/kg]	46 Dy std dev [±]	47 Ho [mg/kg]	48 Ho std dev [±]	49 Er [mg/kg]	50 Er std dev [±]	51 Tm [mg/kg]	52 Tm std dev [±]	53 Yb [mg/kg]	54 Yb std dev [±]	55 Lu [mg/kg]	56 Lu std dev [±]
-31.35	57.2667	5c-A	50.5	0.1	1.96	0.04	15.33	0.09	0.08	0.02	1.12	9.08	0.08	0.19	0.02	10.57	0.07	0.17	0.03	3.37	0.03	7.65	0.06	0.19	0.05	0.60	5.10	0.30	16.40	0.40	2.70	0.10	15.0	0.4	4.600	0.200	1.79	0.06	6.00	0.10	1.15	0.02	7.30	0.10	1.54	0.07	4.60	0.20	0.66	0.01	3.90	0.20	0.58	0.01
-31.35	57.2667	5c-B	50.1	0.1	1.91	0.03	15.22	0.11	0.08	0.02	1.11	8.96	0.09	0.21	0.04	10.50	0.06	0.17	0.02	3.35	0.03	7.53	0.06	0.20	0.05	0.60	4.20	0.20	13.80	0.40	2.40	0.10	12.3	0.4	4.100	0.100	1.46	0.07	5.00	0.40	0.96	0.07	6.10	0.30	1.33	0.08	3.90	0.20	0.53	0.01	3.50	0.30	0.53	0.01
-31.35	57.2667	5c-C	50.0	0.2	1.93	0.04	15.19	0.08	0.06	0.04	1.10	8.98	0.10	0.19	0.03	10.49	0.06	0.17	0.02	3.33	0.03	7.52	0.08	0.19	0.04	0.60	4.40	0.30	14.30	0.70	2.40	0.10	12.7	0.7	4.300	0.100	1.61	0.04	6.00	0.50	0.98	0.07	6.50	0.30	1.40	0.08	4.10	0.10	0.57	0.04	3.60	0.10	0.55	0.04
-31.35	57.2667	5c-D	50.2	0.2	1.86	0.03	15.42	0.06	0.07	0.03	1.08	8.73	0.09	0.17	0.03	10.65	0.06	0.18	0.01	3.31	0.04	7.46	0.05	0.17	0.05	0.61	5.60	0.80	17.30	2.00	2.90	0.40	15.8	2.5	5.400	0.700	1.96	0.33	6.80	1.10	1.17	0.19	7.70	1.10	1.65	0.24	4.70	0.50	0.71	0.09	4.20	0.80	0.67	0.12
-31.35	57.2667	5c-E	50.2	0.2	1.89	0.05	15.31	0.10	0.07	0.02	1.09	8.80	0.07	0.18	0.02	10.66	0.07	0.16	0.02	3.32	0.03	7.48	0.05	0.19	0.03	0.60	3.90	0.20	12.70	1.00	2.20	0.10	11.7	1.0	3.900	0.600	1.36	0.18	5.00	0.40	0.90	0.06	5.60	0.30	1.18	0.09	3.50	0.30	0.50	0.03	3.20	0.30	0.47	0.04
-31.35	57.2667	5d-A	50.3	0.1	1.87	0.05	15.44	0.07	0.10	0.02	1.09	8.82	0.09	0.18	0.03	10.69	0.04	0.18	0.02	3.34	0.03	7.57	0.08	0.19	0.04	0.61	4.23	0.03	13.19	0.03	11.89	0.01			3.861	0.004	1.41	0.01	5.11	0.05			5.88	0.01			3.49	0.01			3.24	0.01	0.50	0.05